So, while CPU Speed is still speculation, apparently it is more than just Memory Speed that is lesser on the Xbox/XBO/XBONE/whatever, compared to the PS4
- PS4 has 50% more GPU Cores and Teraflops of Shader performance than the Xbox (from what I understand, Shader Performance really only matters for particles and stuff like Water/reflections, but GPU cores can be crucial for model complexity)
- PS4 has over 250% the Memory Speed of the Xbox
- PS4 has over 300% the Memory Bandwith of the Xbox (This is likely the most important one as far as game performance)
- Xbox has 32mb of embedded memory for the APU, which will likely help with some of the memory speed difference, but apparently doesn't make up the Memory Bandwith gap?
With that in mind, and the fact that they're using the same Architecture, they both will have the same ease of/difficulty of programming.
I'm not sure if this will just mean that Xbox versions of multiplatform games are going to look like a PC game running at medium settings, and a PS4 version will have them running at high, or they'll both look the same but the PS4 will be locked at 60 fps, and the Xbox 360 will be locked at 30, but it does make the (performance) gap this next gen potentially much more than 360/PS3, and potentially even bigger than Xbox/PS2.
I find this exceedingly saddening, because I really wanted to see them go through a bloody battle on showing why their version was better. Maybe we still will.
Edit: To clarify the intent of this post, as apparently my wording was poor. This has nothing to do with a "winner" of a generation being decided by the hardware. My concern is that I want multiplatform games to be easily made equal in quality on both platforms. As they both have the same ease of coding for the architecture, it is very possible that either the PS4s version of a game will be hampered from what it could be by the XB1 not meeting it's performance, or that XB1's version of a game will be less than stellar because it was optimized for the PS4.
When multiplatform games are equivalent on systems, it is very likely that platform holders will have to strive that much harder to make their unique offerings better, so we end up with better unique games on each system from first and second parties.
Edit: Got moved to the general forum during my above edit. Moving back to Xbox One forum.